根据中文提示，写出单词的正确形式 (每空限填一词).
Which city has the __________ ( 大 ) population in China ?
A ____________ ( 十亿 ) is a thousand million. .
Don’t skate on the _________ (冰  ). It’s too thin.
Some farmers are still working in the __________ ( 田地 ).
People often play _____________( 玩笑) with other people on April Fool’s Day.
Yesterday the grandfather bought a ________ (兔子  ) for his grandson.
The Chinese eat with ______________( 筷子 ).
Don’t make any __________ ( 噪音 ). They are sleeping.
______________ ( 幸运), no one was badly hurt.
The milk __________( 尝 ) a little sour.